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Finding the Fourth Proportional to 465.59, 641.84 and 288.43

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Solution

The fourth proportional to 465.59, 641.84 and 288.43 is: 397.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    465.59 : 641.84 = 288.43 : x
  2. Step 2: Convert to fraction form
    465.59/641.84 = 288.43/x
  3. Step 3: Cross multiply
    465.59x = 641.84 × 288.43
  4. Step 4: Simplify right side
    465.59x = 185,125.91
  5. Step 5: Solve for x
    x = 185,125.91/465.59
  6. Step 6: Final answer
    x = 397.62

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.